A 2-methyl-glyphosate solution and its application

Abstract

The present application relates to the field of weed control, and specifically to a 2-methyl-glyphosate solution and its application; the 2-methyl-glyphosate solution includes the following components in mass percentage: 18-24% glyphosate isopropylamine salt, 4-7% 2-methyl-4-chlorophenoxyacetic acid, 3-5% benzothiazole, 3.7-4.6% A auxiliary agent, 2-2.8% B auxiliary agent, 0.4-0.6% urea, 1-2% citrus extract, 0.05-0.1% sodium bicarbonate, 0.02-0.04% cosolvent, 0.02-0.04% anticaking agent, and 100% water; wherein both A auxiliary agent and B auxiliary agent are plant extracts; and A auxiliary agent contains flavonoids and triterpenoids at the same time; B auxiliary agent contains rutin and nicotinoids at the same time. The present application reduces the content of glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid, and the perilla extract and the like make up for the decline in efficacy, so that a smaller dose of chemical reagents has a greater killing effect.

Description

Technical Field

[0001] The present invention relates to the field of weed control, and more particularly to a 2-methyl-glyphosate solution and its application. Background Art

[0002] Glyphosate is a non-selective, non-residue herbicide with a chemical name of N-(phosphomethyl)glycine and a chemical formula of C 3 H 8 NO 5 P, by inhibiting the activity of plant nitrogen metabolism enzymes leading to plant death, has a wide weed control range and can kill roots, and is popular among farmers. Glyphosate is very effective against perennial root weeds and is widely used in rubber, mulberry, tea, orchards and sugarcane fields. Compared with paraquat and glufosinate pesticides, glyphosate has the advantages of longer effective time and good systemic absorption, and is less toxic to the human body. Paraquat is highly toxic to the human body, and glufosinate is more expensive, so farmers prefer glyphosate as a herbicide. Glyphosate has a very wide weed control range. It is generally not used to kill weeds in crop fields, but is often used to control weeds in ditches, wastelands, and on both sides of highways.

[0003] In the prior art, glyphosate is widely used, including 30%, 46% aqueous solution, 30%, 50% and 65%, 70% soluble powder, but the existing glyphosate has the following problems:

[0004] First, the long-term use of glyphosate may cause some weeds to develop resistance. In order to increase the weed killing effect, farmers often increase the dosage of glyphosate, resulting in a vicious cycle of increased weed resistance, increased dosage, and increased environmental pollution. Based on the above situation, relevant scholars suggest that glyphosate be used in combination with other herbicides to achieve mutual synergy by using the complementary advantages and disadvantages of the herbicides, thereby reducing the emergence of weed resistance. However, most of the current methods are combined with other herbicides, and most of the ingredients of the combined herbicides are chemical agents, which will still lead to increasingly serious problems such as environmental pollution.

[0005] Secondly, glyphosate pesticides use glyphosate isopropylamine salt as the main active ingredient. High-concentration glyphosate isopropylamine salt has a cost advantage due to its good efficacy and low dosage. However, it is easy to crystallize at low temperatures and the crystals are difficult to self-dissolve, which will have an adverse effect on the quality of the weed control agent. At the same time, a high content of active ingredients will also bring more pollution to the environment. Low-concentration glyphosate isopropylamine salt basically does not crystallize and causes less pollution to the environment. However, its dosage is relatively large and its cost advantage is weak. How to balance the content of glyphosate isopropylamine salt is a problem worthy of study.

[0006] In view of this, it is necessary to improve the problem of serious environmental pollution caused by combined use of herbicides, and at the same time reduce the dosage of glyphosate isopropylamine salt and improve its medicinal properties from an environmentally friendly perspective as a compensation. Summary of the invention

[0007] In order to improve the various deficiencies of glyphosate pesticides in the related art, the present application provides a 2-methyl-glyphosate solution and its application.

[0008] In the first aspect, the present application provides a 2-methyl-glyphosate solution, which adopts the following technical solution:

[0009] A 2-methyl-glyphosate solution comprising the following components in percentage by weight:

[0010] Glyphosate isopropylamine salt 18-24%, 2-methyl-4-chlorophenoxyacetic acid 4-7%, benzothiazole 3-5%, auxiliary agent A 3.7-4.6%, auxiliary agent B 2-2.8%, urea 0.4-0.6%, citrus extract 1-2%, sodium bicarbonate 0.05-0.1%, auxiliary solvent 0.02-0.04%, anti-caking agent 0.02-0.04%, water to make up 100%;

[0011] Among them, both auxiliary agents A and B are plant extracts; and auxiliary agent A contains flavonoid compounds and triterpenoid compounds at the same time; auxiliary agent B contains rutin and nicotinic acid glycoside at the same time.

[0012] In a specific implementation scheme, auxiliary agent A is a mixture of Perilla extract and Uncaria rhynchophylla extract in a mass ratio of (1-2):1; the flavonoid compounds in auxiliary agent A account for 0.25-1%, and the triterpenoid compounds account for 0.1-0.25%.

[0013] In a specific possible implementation scheme, the preparation method of the perilla extract in auxiliary agent A includes the following steps: weighing the perilla and crushing it, adding ethylene glycol at a ratio of 10 to 15 ml of ethylene glycol per 1 g of perilla, soaking it fully, then ultrasonically treating it and centrifuging it, taking the supernatant, and filtering it through a filter membrane to obtain the perilla extract.

[0014] In a specific embodiment, auxiliary agent B is cassava leaf extract; auxiliary agent B is cassava leaf extract; auxiliary agent B is cassava leaf extract; cassava leaf extract is obtained by extracting cassava leaves at 90°C with water as the extractant, and during the extraction process, 60-80 ml of water is added for every 1 g of cassava leaves.

[0015] In a specific implementation scheme, citrus dried to constant weight is used as raw material, extracted with water and ethanol as extractants, ultrasonically treated and centrifuged, and then fully freeze-dried under the conditions of -10°C and 10~15Pa to obtain the citrus extract; during the extraction process, 20~30ml of water and 5~10ml of ethanol are added for every 1g of raw material.

[0016] In a specific embodiment, the auxiliary solvent includes one or more of triglycerides, sodium carboxymethyl cellulose, ethylene glycol, and glycerol.

[0017] In a specific embodiment, the anti-caking agent includes one or more of polyvinyl pyrrolidone, polyethylene glycol, sodium hydrogen phosphate, and polyacrylamide.

[0018] In a second aspect, the present application provides an application of a 2-methyl-glyphosate solution, using the following technical solution:

[0019] A 2-methyl-glyphosate solution is used for weed control in non-cultivated land, with a dosage of 120-280 ml / mu.

[0020] The present application has the following beneficial effects: the 2-methyl-glyphosate solution provided by the present application is based on a ternary combined solution, and the content of glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid is reduced. By adding perilla extract, Uncaria extract and cassava leaf extract, the drug efficacy reduction caused by the reduction of the content of glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid is compensated. At the same time, the above-mentioned plant extracts cooperate with glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid, etc., to enhance the effective substances in the components, so that a smaller dose of chemical reagents has a greater killing effect. At the same time, the present application also increases the storage stability of the solution through urea, anti-caking agents and other substances, reduces the possibility of agglomeration and crystallization, and increases the impregnation and killing effect of effective substances such as glyphosate isopropylamine salt on weeds through the synergy of urea, B adjuvant and citrus extract. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the embodiments.

[0022] Existing glyphosate pesticides often have the following problems: single use will increase weed resistance, and compound use also has the problem of too many chemical agents; at the same time, high-concentration and low-concentration glyphosate isopropylamine salts have their own advantages and disadvantages, and it is difficult to reconcile the balance between the concentration of its active ingredient and its disadvantages. In response to the above-mentioned problems of single use and compound use of glyphosate, the applicant combined his own professional experience and conducted relevant experiments, and found that the combination of glyphosate isopropylamine salt with 2-methyl-4-chlorophenoxyacetic acid and benzothiazole to form a ternary combination solution has a significant killing effect on weeds and basically does not cause significant resistance to weeds; further, when the volume of glyphosate isopropylamine salt accounts for about 32%, the volume fraction of 2-methyl-4-chlorophenoxyacetic acid is about 15%, and the volume fraction of benzothiazole reaches about 4%, the herbicidal effect of the ternary combination solution is most significant.

[0023] However, whether it is the above-mentioned glyphosate isopropylamine salt, benzothiazole or 2-methyl-4-chlorophenoxyacetic acid, they are all difficult-to-degrade chemical substances, and the pesticide solution with difficult-to-degrade chemical substances as the active ingredient is inevitably environmentally unfriendly and does not conform to the concept of sustainable development. Therefore, the applicant has improved the formula in view of the above-mentioned problems, by reducing the proportion of glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid in the formula and adding plant extracts to the formula, which not only retains the advantages of the glyphosate isopropylamine salt, 2-methyl-4-chlorophenoxyacetic acid, and benzothiazole ternary combination solution in weakening weed resistance, but also by adding environmentally friendly plant extracts, the rich organic matter in the plant extracts is used to enhance the efficacy of the above-mentioned ternary combination solution, thereby reducing the amount of chemical drugs used and solving one of the technical problems in the prior art.

[0024] However, although the plant extract is rich in organic matter and can enhance the medicinal properties of the above-mentioned ternary combination solution, in a sense, the interactions formed between the rich functional groups contained in the rich organic matter are also diverse. Therefore, even if the content of glyphosate isopropylamine salt is reduced, the excessive interactions between the components in the solution may lead to crystallization of glyphosate isopropylamine salt and other active ingredients, making the storage conditions of the solution harsh and shortening the shelf life. In order to optimize the above-mentioned problem, the applicant has determined the following solution through various experiments: the applicant adds urea and anti-caking agents to the above-mentioned solution components, and forms hydrogen bonds with glyphosate isopropylamine salt molecules through the dispersing effect of urea and anti-caking agents, thereby organizing the aggregation of glyphosate isopropylamine salt molecules. In particular, the role of urea is particularly critical, and its molecular size and configuration also specifically help to disperse the aggregates of glyphosate isopropylamine salt, thereby stably dispersing it in water; in addition, urea molecules also have good water solubility and surface activity, which can reduce the surface tension of effective substances such as glyphosate isopropylamine salt, thereby forming a linear arrangement on its surface, thereby enabling the solution to wet the weed leaves faster.

[0025] In order to increase the weed control ability of the solution without adding chemical agents, the applicant continued to research and develop, and found that although urea can increase the wettability of the solution, the amount of urea added is limited, and most of it still plays the role of dispersion and prevention of agglomeration. Therefore, the applicant added citrus extract to the components and introduced a component that is pollution-free to the environment. The citrus extract mainly contains pectinase, hemicellulase, cellulase and other substances that can degrade the cell walls of weeds, so that the effective substances in the solution can enter the weed cells and complete a series of tasks such as destroying chloroplasts and cell structures. Therefore, the synergistic combination of urea and citrus extract can effectively increase the wettability of the solution to weeds, quickly kill weeds, and has high efficiency, less pesticide residues, and basically all pesticides sprayed on the weeds can take effect.

[0026] The scheme of the present application is further explained below in conjunction with embodiments.

[0027] Preparation Example 1: Preparation of Perilla Extract;

[0028] Weigh 20 g of perilla and crush it, add ethylene glycol at a ratio of 10 ml of ethylene glycol per 1 g of perilla, soak it fully, then ultrasonicate it for 2 hours and centrifuge it at 5000 rpm, take the supernatant, and filter it through a 0.45 μm PVDF filter membrane to obtain a perilla extract.

[0029] Preparation Example 2: Preparation of Perilla Extract;

[0030] Weigh 20 g of perilla and crush it, add ethylene glycol at a ratio of 12 ml per 1 g of perilla, soak it fully, then ultrasonicate it for 2.5 hours and centrifuge it at 5000 rpm, take the supernatant, and filter it through a 0.45 μm PVDF filter membrane to obtain the perilla extract.

[0031] Preparation Example 3: Preparation of Perilla Extract;

[0032] Weigh 20 g of perilla and crush it, add ethylene glycol at a ratio of 15 ml of ethylene glycol per 1 g of perilla, soak it fully, then ultrasonicate it for 3 hours and centrifuge it at 5000 rpm, take the supernatant, and filter it through a 0.45 μm PVDF filter membrane to obtain the perilla extract.

[0033] Preparation Example 4: Preparation of Uncaria rhynchophylla extract;

[0034] Take 20g of Uncaria rhynchophylla, add 50ml of water, and heat to 45℃ for soaking. Adjust the pH value to 9 with 10% sodium hydroxide solution, then shake and extract with ether for 3 times, adding 25ml of ether each time, combine the three ether extracts, dry to constant weight, soak the obtained residue with 4ml of anhydrous ethanol, and filter through a 0.22μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract.

[0035] Preparation Example 5: Preparation of Uncaria rhynchophylla extract;

[0036] Take 20g of Uncaria rhynchophylla, add 50ml of water, and heat to 45℃ for soaking. Adjust the pH value to 9 with 10% sodium hydroxide solution, then shake and extract with ether for 3 times, adding 30ml of ether each time, combine the three ether extracts, dry to constant weight, soak the obtained residue with 5ml of anhydrous ethanol, and filter through a 0.22μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract.

[0037] Preparation Example 6: Preparation of Uncaria rhynchophylla extract;

[0038] Take 20g of Uncaria rhynchophylla, add 50ml of water, and heat to 45℃ for soaking. Adjust the pH value to 9 with 10% sodium hydroxide solution, then shake and extract with ether for 3 times, adding 40ml of ether each time, combine the three ether extracts, dry to constant weight, soak the obtained residue with 6ml of anhydrous ethanol, and filter through a 0.22μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract.

[0039] Preparation Example 7: Preparation of cassava leaf extract;

[0040] Take 25 g of dried cassava leaves, add 60 ml of water per 1 g of cassava leaves, heat to 90°C, stir at 180 r / min for 1 h to obtain an extract, and then filter using a 0.45 μm PVDF membrane to obtain a cassava leaf extract.

[0041] Preparation Example 8: Preparation of cassava leaf extract;

[0042] Take 25 g of dried cassava leaves, add 70 ml of water per 1 g of cassava leaves, heat to 90°C, stir at 180 r / min for 1 h to obtain an extract, and then filter using a 0.45 μm PVDF membrane to obtain a cassava leaf extract.

[0043] Preparation Example 9: Preparation of cassava leaf extract;

[0044] Take 25 g of dried cassava leaves, add 80 ml of water per 1 g of cassava leaves, heat to 90°C, stir at 180 r / min for 1 h to obtain an extract, and then filter using a 0.45 μm PVDF membrane to obtain a cassava leaf extract.

[0045] Preparation Example 10: Preparation of citrus extract;

[0046] Citrus is used as raw material, the peel and seeds are removed, the fruit is cut into small pieces, and then placed in an oven at 50°C to dry to constant weight, taken out and cooled to room temperature to obtain citrus dry product; 30g of citrus dry product is taken, 20ml of water and 5ml of ethanol are added to every 1g of dry product, and the mixture is placed in an ultrasonic cleaner, and ultrasonicated at 40kHz for 30min to obtain a mixture; the mixture is taken out, centrifuged at 4000rpm for 10min, the supernatant is ultrasonicated again, the ultrasonic frequency is maintained unchanged for 30min, and then centrifuged under the same conditions for 10min, and finally the supernatant after centrifugation is placed in a freeze dryer, and freeze-dried for 2h at -10°C and 10Pa to obtain citrus extract.

[0047] Preparation Example 11:

[0048] Citrus is used as raw material, the peel and seeds are removed, the fruit is cut into small pieces, and then placed in an oven at 50°C to dry to constant weight, taken out and cooled to room temperature to obtain citrus dry product; 30g of citrus dry product is taken, 25ml of water and 8ml of ethanol are added to every 1g of dry product, and the mixture is placed in an ultrasonic cleaner, and ultrasonicated at 40kHz for 30min to obtain a mixture; the mixture is taken out, centrifuged at 4000rpm for 10min, the supernatant is ultrasonicated again, the ultrasonic frequency is maintained unchanged for 30min, and then centrifuged under the same conditions for 10min, and finally the supernatant after centrifugation is placed in a freeze dryer, and freeze-dried for 2h at -10°C and 12Pa to obtain citrus extract.

[0049] Preparation Example 12:

[0050] Citrus is used as a raw material, the peel and seeds are removed, the fruit is cut into small pieces, and then placed in an oven at 50°C to dry to constant weight, taken out and cooled to room temperature to obtain a citrus dry product; 30g of citrus dry product is taken, 30ml of water and 10ml of ethanol are added to every 1g of dry product, and the mixture is placed in an ultrasonic cleaner, and ultrasonicated at 40kHz for 30min to obtain a mixture; the mixture is taken out, centrifuged at 4000rpm for 10min, the supernatant is ultrasonicated again, the ultrasonic frequency is maintained unchanged for 30min, and then centrifuged under the same conditions for 10min, and finally the supernatant after centrifugation is placed in a freeze dryer, and freeze-dried for 2h at -10°C and 15Pa to obtain a citrus extract.

[0051] In the above preparation examples, the raw materials used can be obtained commercially, and treatment methods such as freezing and drying are relatively mature methods in the prior art.

[0052] Example

[0053] Example 1

[0054] This embodiment provides a 2-methyl-glyphosate solution, which is prepared by mechanically stirring and mixing the following components in percentage by mass:

[0055] Glyphosate isopropylamine salt 18%, 2-methyl-4-chlorophenoxyacetic acid 4%, benzothiazole 3%, auxiliary agent A 3.7%, auxiliary agent B 2%, urea 0.4%, citrus extract 1%, sodium bicarbonate 0.05%, auxiliary solvent 0.02%, anti-caking agent 0.02%, and the balance is water, making up to 100%.

[0056] In this embodiment, glyphosate isopropylamine salt, 2-methyl-4-chlorophenoxyacetic acid, and benzothiazole are commercially available; auxiliary agent A is a plant extract containing both flavonoid compounds and triterpenoid compounds, specifically a perilla extract and an Uncaria rhynchophylla extract compounded in a mass ratio of 1:1, wherein the perilla extract is prepared by Preparation Example 1, and the Uncaria rhynchophylla extract is prepared by Example 4; auxiliary agent B is a plant extract containing both rutin and nicotinic acid, specifically a cassava leaf extract, and the cassava leaf extract in this embodiment is prepared by Preparation Example 7; the citrus extract in this embodiment is prepared by Preparation Example 10; the cosolvent is triglyceride; and the anti-caking agent is polyethylene glycol.

[0057] Example 2

[0058] This embodiment provides a 2-methyl-glyphosate solution, which is prepared by mechanically stirring and mixing the following components in percentage by mass:

[0059] Glyphosate isopropylamine salt 20%, 2-methyl-4-chlorophenoxyacetic acid 5%, benzothiazole 4%, auxiliary agent A 4.0%, auxiliary agent B 2.2%, urea 0.4%, citrus extract 1.4%, sodium bicarbonate 0.07%, auxiliary solvent 0.03%, anti-caking agent 0.03%, and the balance is water, making up to 100%.

[0060] In this embodiment, glyphosate isopropylamine salt, 2-methyl-4-chlorophenoxyacetic acid, and benzothiazole are commercially available; auxiliary agent A is a plant extract containing both flavonoid compounds and triterpenoid compounds, specifically a perilla extract and an Uncaria rhynchophylla extract compounded in a mass ratio of 1.2:1, wherein the perilla extract is prepared by Preparation Example 2, and the Uncaria rhynchophylla extract is prepared by Example 5; auxiliary agent B is a plant extract containing both rutin and nicotinic acid, specifically a cassava leaf extract, and the cassava leaf extract in this embodiment is prepared by Preparation Example 8; the citrus extract in this embodiment is prepared by Preparation Example 11; the auxiliary solvent is ethylene glycol; and the anti-caking agent is sodium hydrogen phosphate.

[0061] Example 3

[0062] This embodiment provides a 2-methyl-glyphosate solution, which is prepared by mechanically stirring and mixing the following components in percentage by mass:

[0063] Glyphosate isopropylamine salt 21%, 2-methyl-4-chlorophenoxyacetic acid 6%, benzothiazole 4%, auxiliary agent A 4.2%, auxiliary agent B 2.4%, urea 0.5%, citrus extract 1.5%, sodium bicarbonate 0.07%, auxiliary solvent 0.03%, anti-caking agent 0.03%, and the balance is water, making up to 100%.

[0064] In this embodiment, glyphosate isopropylamine salt, 2-methyl-4-chlorophenoxyacetic acid, and benzothiazole are commercially available, auxiliary agent A is a plant extract containing both flavonoids and triterpenoids, specifically a perilla extract and an Uncaria rhynchophylla extract compounded in a mass ratio of 1.5:1, wherein the perilla extract is prepared by Preparation Example 2, and the Uncaria rhynchophylla extract is prepared by Example 5; auxiliary agent B is a plant extract containing both rutin and nicotinic acid, specifically a cassava leaf extract, and the cassava leaf extract in this embodiment is prepared by Preparation Example 8; the citrus extract in this embodiment is prepared by Preparation Example 11; the auxiliary solvent is sodium carboxymethyl cellulose and triglyceride compounded in a mass ratio of 2:1; the anti-caking agent is polyvinyl pyrrolidone and polyacrylamide compounded in a mass ratio of 1.2:1.

[0065] Example 4

[0066] This embodiment provides a 2-methyl-glyphosate solution, which is prepared by mechanically stirring and mixing the following components in percentage by mass:

[0067] Glyphosate isopropylamine salt 20%, 2-methyl-4-chlorophenoxyacetic acid 6%, benzothiazole 4%, auxiliary agent A 4.4%, auxiliary agent B 2.6%, urea 0.6%, citrus extract 1.8%, sodium bicarbonate 0.08%, auxiliary solvent 0.03%, anti-caking agent 0.03%, and the balance is water, making up to 100%.

[0068] In this embodiment, glyphosate isopropylamine salt, 2-methyl-4-chlorophenoxyacetic acid, and benzothiazole are commercially available; auxiliary agent A is a plant extract containing both flavonoids and triterpenoids, specifically a perilla extract and an Uncaria rhynchophylla extract compounded in a mass ratio of 1.8:1, wherein the perilla extract is prepared by Preparation Example 2, and the Uncaria rhynchophylla extract is prepared by Example 5; auxiliary agent B is a plant extract containing both rutin and nicotinic acid, specifically a cassava leaf extract, and the cassava leaf extract in this embodiment is prepared by Preparation Example 8; the citrus extract in this embodiment is prepared by Preparation Example 11; the auxiliary solvent is glycerol; and the anti-caking agent is polyvinyl pyrrolidone.

[0069] Example 5

[0070] This embodiment provides a 2-methyl-glyphosate solution, which is prepared by mechanically stirring and mixing the following components in percentage by mass:

[0071] Glyphosate isopropylamine salt 24%, 2-methyl-4-chlorophenoxyacetic acid 7%, benzothiazole 5%, auxiliary agent A 4.6%, auxiliary agent B 2.8%, urea 0.6%, citrus extract 2%, sodium bicarbonate 0.1%, auxiliary solvent 0.04%, anti-caking agent 0.04%, and the balance is water, making up to 100%.

[0072] In this embodiment, glyphosate isopropylamine salt, 2-methyl-4-chlorophenoxyacetic acid, and benzothiazole are commercially available; auxiliary agent A is a plant extract containing both flavonoids and triterpenoids, specifically a perilla extract and an Uncaria rhynchophylla extract mixed in a mass ratio of 2:1, wherein the perilla extract is prepared by Preparation Example 3, and the Uncaria rhynchophylla extract is prepared by Example 6; auxiliary agent B is a plant extract containing both rutin and nicotinic acid, specifically a cassava leaf extract, and the cassava leaf extract in this embodiment is prepared by Preparation Example 9; the citrus extract in this embodiment is prepared by Preparation Example 12; the auxiliary solvent is ethylene glycol and glycerol mixed in a mass ratio of 1:1; the anti-caking agent is polyacrylamide.

[0073] It should be noted that the auxiliary solvent and anti-caking agent in the above embodiments are all preferred specific embodiments. The auxiliary solvent can be one or more of triglycerides, sodium carboxymethyl cellulose, ethylene glycol, and propylene glycol, and the anti-caking agent can be one or more of polyvinyl pyrrolidone, polyethylene glycol, sodium hydrogen phosphate, and polyacrylamide.

[0074] When auxiliary agent A is Perilla extract and Uncaria rhynchophylla extract, and is compounded according to the ratios described in Examples 1 to 5 above, the flavonoids in auxiliary agent A account for 0.25 to 1%, and the triterpenoids account for 0.1 to 0.25%.

[0075] Comparative Example

[0076] Comparative Example 1

[0077] This comparative example is compared with Example 1, and the difference is that 2-methyl-4-chlorophenoxyacetic acid is lacking in the components.

[0078] Comparative Example 2

[0079] This comparative example is compared with Example 1, and the difference is that benzothiazole is missing in the components.

[0080] Comparative Example 3

[0081] This comparative example is compared with Example 1, and the difference is that the component lacks A auxiliary agent.

[0082] Comparative Example 4

[0083] This comparative example is compared with Example 1, and the difference is that the component lacks the B auxiliary agent.

[0084] Comparative Example 5

[0085] This comparative example is compared with Example 1, and the difference is that the auxiliary agent A in the component is only the perilla extract prepared by Preparation Example 1.

[0086] Comparative Example 6

[0087] This comparative example is compared with Example 1, and the difference is that the auxiliary agent A in the component is only the Uncaria rhynchophylla extract, which is prepared by Preparation Example 4.

[0088] Comparative Example 7

[0089] This comparative example is compared with Example 1, and the difference is that urea is lacking in the components.

[0090] Comparative Example 8

[0091] This comparative example is compared with Example 1, and the difference is that the citrus extract is missing from the components.

[0092] Performance testing

[0093] Performance testing was performed on the above-mentioned Examples 1-5 and Comparative Examples 1-8.

[0094] 1. Stability test: The glyphosate solutions of Examples 1 to 5 and Comparative Example 7 were used as samples and left to stand at 15°C, 25°C, and 35°C for 7 days, and the water-insoluble content was measured and calculated. The results are shown in Table 1.

[0095] Table 1

[0096]

[0097] 2. Weed growth inhibition test; Examples 1 to 5 and Comparative Examples 1 to 8 were respectively subjected to weed growth inhibition tests, wherein each Example / Comparative Example was subjected to the following test: a plurality of test areas of 1 square meter were respectively demarcated in the wasteland where Chenopodium album and Chickweed grew, ensuring that there were no less than 5 Chenopodium album / Chickweed in each test area, and then the corresponding Example / Comparative Example samples were sprayed on the above test areas, with an application rate of 0.2 g of solution per square meter (before dilution), the temperature was controlled at 25°C, the humidity was 70%, the light condition was 12h, two Chenopodium album / Chickweed were reserved in each group as blank controls, and finally the growth changes of Chenopodium album / Chickweed were observed at different periods.

[0098] Test results:

[0099] The natural growth of all blank control plants was good. The test results of Examples 1 to 5 and Comparative Examples 1 to 8 are as follows, where "Ⅰ", "Ⅱ", "Ⅲ", "Ⅳ", and "Ⅴ" represent the yellowing degree of the leaves of Chenopodium album / Chickenia serrata, with "Ⅰ" being the weakest and "Ⅴ" being the strongest.

[0100] Example 1: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of IV; the leaves of Chickweed turned yellow, with a degree of III; seven days after application, the leaves of Chenopodium album and Chickweed withered, and the plants fell over.

[0101] Example 2: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of IV; the leaves of Chickweed turned yellow, with a degree of IV; seven days after application, the leaves of Chenopodium album and Chickweed withered, and the plants fell over.

[0102] Example 3: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of V; the leaves of Chickweed turned yellow, with a degree of IV; seven days after application, the leaves of Chenopodium album and Chickweed withered, and the plants fell over.

[0103] Example 4: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of IV; the leaves of Chickweed turned yellow, with a degree of V; seven days after application, the leaves of Chenopodium album and Chickweed withered, and the plants fell over.

[0104] Example 5: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of IV; the leaves of Chickweed turned yellow, with a degree of III; seven days after application, the leaves of Chenopodium album and Chickweed withered, and the plants fell over.

[0105] Comparative Example 1: Three days after application, the leaves of Chenopodium album turned yellow, with degree Ⅰ; the leaves of Chickweed turned yellow, with degree Ⅰ; seven days after application, the leaves of Chenopodium album turned yellow to degree Ⅳ, and the leaves of Chickweed turned yellow to degree Ⅲ, the leaves did not wither, and the plants did not fall over.

[0106] Comparative Example 2: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of II; the leaves of Chickweed turned yellow, with a degree of II; seven days after application, the leaves of Chenopodium album turned yellow to a degree of IV, and the leaves of Chickweed turned yellow to a degree of IV, the leaves did not wither, and the plants did not fall over.

[0107] Comparative Example 3: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of II; the leaves of Chickweed turned yellow, with a degree of II; seven days after application, the leaves of Chenopodium album turned yellow to a degree of IV, the leaves of Chickweed withered, and the plants did not fall over.

[0108] Comparative Example 4: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of II; the leaves of Chickweed turned yellow, with a degree of II; seven days after application, the leaves of Chenopodium album turned yellow to a degree of V, the leaves of Chickweed withered, and the plants did not fall over.

[0109] Comparative Example 5: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of II; the leaves of Chickweed turned yellow, with a degree of II; seven days after application, the leaves of Chenopodium album withered, and the leaves of Chickweed turned yellow with a degree of V, and the plants did not fall over.

[0110] Comparative Example 6: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of II; the leaves of Chickweed turned yellow, with a degree of II; seven days after application, the leaves of Chenopodium album turned yellow to a degree of V, the leaves of Chickweed withered, and the plants fell over.

[0111] Comparative Example 7: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of Ⅰ; the leaves of Chickweed turned yellow, with a degree of Ⅱ; seven days after application, the leaves of Chenopodium album turned yellow to a degree of Ⅳ, and the leaves of Chickweed turned yellow to a degree of Ⅳ, the leaves did not wither, and the plants did not fall over.

[0112] Comparative Example 8: Three days after application, the leaves of Chenopodium album turned yellow, with a degree of Ⅰ; the leaves of Chickweed turned yellow, with a degree of Ⅰ; seven days after application, the leaves of Chenopodium album and Chickweed withered, and the plants did not fall over.

[0113] Result analysis:

[0114] The 2-methyl-glyphosate solution of the present application is a composite herbicide, which has a good killing effect on dicotyledonous angiosperm weeds, especially Chenopodium album and Chickweed. Its mechanism and the synergistic relationship of each component may be as follows:

[0115] Glyphosate isopropylamine salt: As the main active ingredient, glyphosate isopropylamine salt interferes with plant protein synthesis by inhibiting key enzymes in the shikimic acid pathway, leading to plant death.

[0116] 2-Methyl-4-chlorophenoxyacetic acid and benzothiazole: used in combination with glyphosate isopropylamine salt to form a ternary combination solution, which can enhance the herbicidal effect of glyphosate and reduce the possibility of weed resistance. The effect of the ternary combination solution is greater than the effect of either of the above two combined with glyphosate isopropylamine salt.

[0117] A auxiliary agent: Perilla extract and Uncaria rhynchophylla extract: These two extracts contain flavonoids and triterpenoids, which may play the following roles: 1. Flavonoids and triterpenoids can combine with glyphosate to form a complex, promote the absorption of glyphosate by weed leaves, increase the concentration of glyphosate in weeds, and make it more effectively interfere with and destroy the protein synthesis of weeds, thereby enhancing the weed control effect of glyphosate. 2. Flavonoids and triterpenoids can interfere with the metabolic process in weeds and reduce the resistance of weeds to glyphosate; by inhibiting the activity of enzymes in weeds, they can reduce the metabolic capacity of weeds to glyphosate, keep glyphosate at a high concentration in weeds, prolong its action time, and thus enhance the killing effect on weeds. 3. Flavonoids and triterpenoids also have the function of regulating weed growth, which can affect the synthesis and balance of hormones in weeds, interfere with the normal growth process of weeds, and thus accelerate the aging and death of weeds.

[0118] B auxiliary agent: Cassava leaf extract: contains compounds such as rutin and nicotinic acid glycoside. Rutin and nicotinic acid glycoside can mainly stimulate the cell membrane of weed cells, allowing active ingredients such as glyphosate isopropylamine salt to enter the weed cells more thoroughly.

[0119] Citrus extract: contains pectinase, hemicellulase, cellulase and other substances that can degrade the cell walls of weeds, allowing effective substances such as glyphosate to enter the weed cells and destroy chloroplasts and cell structures.

[0120] Urea: By forming hydrogen bonds with glyphosate isopropylamine salt molecules, it can organize their aggregation. At the same time, the molecular size and configuration of urea help to disperse the aggregates of glyphosate isopropylamine salt, making it stably dispersed in water. In addition, urea molecules also have good water solubility and surface activity, which can reduce the surface tension of effective substances such as glyphosate isopropylamine salt, forming a linear arrangement on its surface, thereby making it wet the weed leaves faster.

[0121] Sodium bicarbonate: As a pH adjuster, it ensures that the pH value of the solution is within the appropriate range, thus ensuring that each component is stable and effective.

[0122] Co-solvent: Increase the solubility of glyphosate solution to ensure that all active ingredients can be fully dissolved and stably dispersed in water.

[0123] Anticaking agent: prevents glyphosate crystals from agglomerating during production and storage, ensuring product uniformity and stability.

[0124] Therefore, the components of Examples 1 to 5 cooperated with each other to finally achieve the purpose of killing weeds. The components of Comparative Examples 1 to 8 were defective compared with Example 1, which also positively verified the effects of the above components. The macroscopic manifestation was that the growth inhibition effect of Comparative Examples 1 to 8 on weeds was not as good as that of Example 1.

[0125] In summary, the 2-methyl-glyphosate solution provided by the present application is based on the ternary combined solution, reduces the content of glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid, and compensates for the decrease in the efficacy of glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid caused by the reduction in the content of perilla extract, Uncaria extract and cassava leaf extract. At the same time, the perilla extract, Uncaria extract and cassava leaf extract cooperate with glyphosate isopropylamine salt and 2-methyl-4-chlorophenoxyacetic acid, etc., to enhance the effective substances in the components, so that a smaller dose of chemical reagents has a greater killing effect. At the same time, the present application also increases the storage stability of the solution through substances such as urea and anti-caking agents, reduces the possibility of agglomeration and crystallization, and at the same time, through the synergy of urea, B adjuvant and citrus extract, increases the impregnation and killing effect of effective substances such as glyphosate isopropylamine salt on weeds.

[0126] This application can be used for weed control in non-arable land, especially for the control of dicotyledonous weeds. The recommended dosage is 120~280ml / mu.

[0127] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A 2-methyl-glyphosate solution, characterized in that: It is prepared by mechanically stirring and mixing the following components in percentage by mass: Glyphosate isopropylamine salt 18%, 2-methyl-4-chlorophenoxyacetic acid 4%, benzothiazole 3%, auxiliary agent A 3.7%, auxiliary agent B 2%, urea 0.4%, citrus extract 1%, sodium bicarbonate 0.05%, auxiliary solvent 0.02%, anti-caking agent 0.02%, the balance is water, making up to 100%; The auxiliary agent A is a mixture of Perilla extract and Uncaria rhynchophylla extract in a mass ratio of 1:1; the auxiliary agent B is a cassava leaf extract; The preparation method of the perilla extract is as follows: weigh 20g of perilla and crush it, add ethylene glycol at a ratio of 10ml per 1g of perilla, fully soak, then ultrasonicate for 2h and centrifuge at 5000rpm, take the supernatant, and filter it through a 0.45μm PVDF filter membrane to obtain the perilla extract; The preparation method of the Uncaria rhynchophylla extract is as follows: 20 g of Uncaria rhynchophylla is taken, 50 ml of water is added, and the mixture is heated to 45° C. and soaked; the pH value is adjusted to 9 with a 10% sodium hydroxide solution, and then the mixture is shaken and extracted with ether for 3 times, 25 ml of ether is added each time, the ether extracts obtained three times are combined, and the mixture is dried to a constant weight, and the residue is soaked with 4 ml of anhydrous ethanol, and filtered through a 0.22 μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract; The preparation method of the cassava extract is as follows: take 25g of cassava leaves with dried surface moisture, add 60ml of water per 1g of cassava leaves, heat to 90°C, stir at 180r / min for 1h to obtain an extract, and then filter using a 0.45μm PVDF membrane to obtain a cassava leaf extract; The preparation method of the citrus extract is as follows: using citrus as a raw material, removing the peel and seeds, cutting into small pieces, then placing in an oven to dry at 50° C. to constant weight, taking out and cooling to room temperature to obtain a citrus dry product; taking 30 g of the citrus dry product, adding 20 ml of water and 5 ml of ethanol per 1 g of the dry product, placing in an ultrasonic cleaner, and ultrasonicating at 40 kHz for 30 minutes to obtain a mixture; taking out the mixture, centrifuging at 4000 rpm for 10 minutes, ultrasonicating the supernatant again, maintaining the ultrasonic frequency unchanged for 30 minutes, and then centrifuging under the same conditions for 10 minutes, and finally placing the supernatant after centrifugation in a freeze dryer, and freeze-drying at -10° C. and 10 Pa for 2 hours to obtain the citrus extract; The auxiliary solvent is triglyceride; the anticaking agent is polyethylene glycol.

2. A 2-methyl-glyphosate solution, characterized in that: It is prepared by mechanically stirring and mixing the following components in percentage by mass: Glyphosate isopropylamine salt 20%, 2-methyl-4-chlorophenoxyacetic acid 5%, benzothiazole 4%, auxiliary agent A 4.0%, auxiliary agent B 2.2%, urea 0.4%, citrus extract 1.4%, sodium bicarbonate 0.07%, auxiliary solvent 0.03%, anti-caking agent 0.03%, the balance is water, making up to 100%; The auxiliary agent A is a mixture of Perilla extract and Uncaria rhynchophylla extract in a mass ratio of 1.2:1, and the auxiliary agent B is a cassava leaf extract; The preparation method of the perilla extract is as follows: weigh 20g of perilla and crush it, add ethylene glycol at a ratio of 12ml per 1g of perilla, soak it fully, then ultrasonicate it for 2.5h and centrifuge it at 5000rpm, take the supernatant, and filter it through a 0.45μm PVDF filter membrane to obtain the perilla extract; The preparation method of the Uncaria rhynchophylla extract is as follows: 20 g of Uncaria rhynchophylla is taken, 50 ml of water is added, and the mixture is heated to 45° C. and soaked; the pH value is adjusted to 9 with a 10% sodium hydroxide solution, and then the mixture is shaken and extracted with ether for 3 times, 30 ml of ether is added each time, the three ether extracts are combined, and the mixture is dried to a constant weight, and the residue is soaked with 5 ml of anhydrous ethanol, and filtered through a 0.22 μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract; The preparation method of the cassava leaf extract is as follows: take 25g of cassava leaves with dried surface moisture, add 70ml of water per 1g of cassava leaves, heat to 90°C, stir at 180r / min for 1h to obtain an extract, and then filter using a 0.45μm PVDF membrane to obtain a cassava leaf extract; The preparation method of the citrus extract is as follows: using citrus as a raw material, removing the peel and seeds, cutting into small pieces, then placing in an oven at 50° C. to dry to constant weight, taking out and cooling to room temperature to obtain a citrus dry product; taking 30 g of the citrus dry product, adding 25 ml of water and 8 ml of ethanol per 1 g of the dry product, placing in an ultrasonic cleaner, and ultrasonicating at 40 kHz for 30 minutes to obtain a mixture; taking out the mixture, centrifuging at 4000 rpm for 10 minutes, ultrasonicating the supernatant again, maintaining the ultrasonic frequency unchanged for 30 minutes, and then centrifuging under the same conditions for 10 minutes, and finally placing the supernatant after centrifugation in a freeze dryer, and freeze-drying at -10° C. and 12 Pa for 2 hours to obtain the citrus extract; The auxiliary solvent is ethylene glycol; the anti-caking agent is sodium hydrogen phosphate.

3. A 2-methyl-glyphosate solution, characterized in that: It is prepared by mechanically stirring and mixing the following components in percentage by mass: Glyphosate isopropylamine salt 21%, 2-methyl-4-chlorophenoxyacetic acid 6%, benzothiazole 4%, auxiliary agent A 4.2%, auxiliary agent B 2.4%, urea 0.5%, citrus extract 1.5%, sodium bicarbonate 0.07%, auxiliary solvent 0.03%, anti-caking agent 0.03%, the balance is water, making up to 100%; The auxiliary agent A is a mixture of Perilla extract and Uncaria rhynchophylla extract in a mass ratio of 1.5:1; the auxiliary agent B is a cassava leaf extract; The preparation method of the perilla extract is as follows: weigh 20g of perilla and crush it, add ethylene glycol at a ratio of 12ml per 1g of perilla, soak it fully, then ultrasonicate it for 2.5h and centrifuge it at 5000rpm, take the supernatant, and filter it through a 0.45μm PVDF filter membrane to obtain the perilla extract; The preparation method of the Uncaria rhynchophylla extract is as follows: 20 g of Uncaria rhynchophylla is taken, 50 ml of water is added, and the mixture is heated to 45° C. and soaked; the pH value is adjusted to 9 with a 10% sodium hydroxide solution, and then the mixture is shaken and extracted with ether for 3 times, 30 ml of ether is added each time, the three ether extracts are combined, and the mixture is dried to a constant weight, and the residue is soaked with 5 ml of anhydrous ethanol, and filtered through a 0.22 μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract; The preparation method of the cassava leaf extract is as follows: take 25g of cassava leaves with dried surface moisture, add 70ml of water per 1g of cassava leaves, heat to 90°C, stir at 180r / min for 1h to obtain an extract, and then filter using a 0.45μm PVDF membrane to obtain a cassava leaf extract; The preparation method of the citrus extract is as follows: using citrus as a raw material, removing the peel and seeds, cutting into small pieces, then placing in an oven at 50° C. to dry to constant weight, taking out and cooling to room temperature to obtain a citrus dry product; taking 30 g of the citrus dry product, adding 25 ml of water and 8 ml of ethanol per 1 g of the dry product, placing in an ultrasonic cleaner, and ultrasonicating at 40 kHz for 30 minutes to obtain a mixture; taking out the mixture, centrifuging at 4000 rpm for 10 minutes, ultrasonicating the supernatant again, maintaining the ultrasonic frequency unchanged for 30 minutes, and then centrifuging under the same conditions for 10 minutes, and finally placing the supernatant after centrifugation in a freeze dryer, and freeze-drying at -10° C. and 12 Pa for 2 hours to obtain the citrus extract; The auxiliary solvent is sodium carboxymethyl cellulose and triglyceride mixed in a mass ratio of 2:1; the anti-caking agent is polyvinyl pyrrolidone and polyacrylamide mixed in a mass ratio of 1.2:

1.

4. A 2-methyl-glyphosate solution, characterized in that: It is prepared by mechanically stirring and mixing the following components in percentage by mass: Glyphosate isopropylamine salt 20%, 2-methyl-4-chlorophenoxyacetic acid 6%, benzothiazole 4%, auxiliary agent A 4.4%, auxiliary agent B 2.6%, urea 0.6%, citrus extract 1.8%, sodium bicarbonate 0.08%, auxiliary solvent 0.03%, anti-caking agent 0.03%, the balance is water, making up to 100%; The auxiliary agent A is a mixture of Perilla extract and Uncaria rhynchophylla extract in a mass ratio of 1.8:1; the auxiliary agent B is a cassava leaf extract; The preparation method of the perilla extract is as follows: weigh 20g of perilla and crush it, add ethylene glycol at a ratio of 12ml per 1g of perilla, soak it fully, then ultrasonicate it for 2.5h and centrifuge it at 5000rpm, take the supernatant, and filter it through a 0.45μm PVDF filter membrane to obtain the perilla extract; The preparation method of the Uncaria rhynchophylla extract is as follows: 20 g of Uncaria rhynchophylla is taken, 50 ml of water is added, and the mixture is heated to 45° C. and soaked; the pH value is adjusted to 9 with a 10% sodium hydroxide solution, and then the mixture is shaken and extracted with ether for 3 times, 30 ml of ether is added each time, the three ether extracts are combined, and the mixture is dried to a constant weight, and the residue is soaked with 5 ml of anhydrous ethanol, and filtered through a 0.22 μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract; The preparation method of the cassava leaf extract is as follows: take 25g of cassava leaves with dried surface moisture, add 70ml of water per 1g of cassava leaves, heat to 90°C, stir at 180r / min for 1h to obtain an extract, and then filter using a 0.45μm PVDF membrane to obtain a cassava leaf extract; The preparation method of the citrus extract is as follows: using citrus as a raw material, removing the peel and seeds, cutting into small pieces, then placing in an oven at 50° C. to dry to constant weight, taking out and cooling to room temperature to obtain a citrus dry product; taking 30 g of the citrus dry product, adding 25 ml of water and 8 ml of ethanol per 1 g of the dry product, placing in an ultrasonic cleaner, and ultrasonicating at 40 kHz for 30 minutes to obtain a mixture; taking out the mixture, centrifuging at 4000 rpm for 10 minutes, ultrasonicating the supernatant again, maintaining the ultrasonic frequency unchanged for 30 minutes, and then centrifuging under the same conditions for 10 minutes, and finally placing the supernatant after centrifugation in a freeze dryer, and freeze-drying at -10° C. and 12 Pa for 2 hours to obtain the citrus extract; The auxiliary solvent is glycerol; the anti-caking agent is polyvinyl pyrrolidone.

5. A 2-methyl-glyphosate solution, characterized in that: It is prepared by mechanically stirring and mixing the following components in percentage by mass: Glyphosate isopropylamine salt 24%, 2-methyl-4-chlorophenoxyacetic acid 7%, benzothiazole 5%, auxiliary agent A 4.6%, auxiliary agent B 2.8%, urea 0.6%, citrus extract 2%, sodium bicarbonate 0.1%, auxiliary solvent 0.04%, anti-caking agent 0.04%, the balance is water, making up to 100%; The auxiliary agent A is a mixture of Perilla extract and Uncaria rhynchophylla extract in a mass ratio of 2:1; the auxiliary agent B is a cassava leaf extract; The preparation method of the perilla extract is as follows: weigh 20g of perilla and crush it, add ethylene glycol at a ratio of 15ml per 1g of perilla, fully soak, then ultrasonicate for 3h and centrifuge at 5000rpm, take the supernatant, and filter it through a 0.45μm PVDF filter membrane to obtain the perilla extract; The preparation method of the Uncaria rhynchophylla extract is as follows: 20 g of Uncaria rhynchophylla is taken, 50 ml of water is added, and the mixture is heated to 45° C. and soaked; the pH value is adjusted to 9 with a 10% sodium hydroxide solution, and then the mixture is shaken and extracted with ether for 3 times, 40 ml of ether is added each time, the ether extracts obtained three times are combined, and the mixture is dried to a constant weight, and the residue is soaked with 6 ml of anhydrous ethanol, and filtered through a 0.22 μm PVDF filter membrane to obtain the Uncaria rhynchophylla extract; The preparation method of the cassava leaf extract is as follows: take 25g of cassava leaves with dried surface moisture, add 80ml of water per 1g of cassava leaves, heat to 90°C, stir at 180r / min for 1h to obtain an extract, and then filter using a 0.45μm PVDF membrane to obtain a cassava leaf extract; The preparation method of the citrus extract is as follows: using citrus as a raw material, removing the peel and seeds, cutting into small pieces, then placing in an oven at 50° C. to dry to constant weight, taking out and cooling to room temperature to obtain a citrus dry product; taking 30 g of the citrus dry product, adding 30 ml of water and 10 ml of ethanol per 1 g of the dry product, placing in an ultrasonic cleaner, and ultrasonicating at 40 kHz for 30 minutes to obtain a mixture; taking out the mixture, centrifuging at 4000 rpm for 10 minutes, ultrasonicating the supernatant again, maintaining the ultrasonic frequency unchanged for 30 minutes, and then centrifuging under the same conditions for 10 minutes, and finally placing the supernatant after centrifugation in a freeze dryer, and freeze-drying at -10° C. and 15 Pa for 2 hours to obtain the citrus extract; The auxiliary solvent is ethylene glycol and glycerol mixed in a mass ratio of 1:1; the anti-caking agent is polyacrylamide.

6. The use of a 2-methyl-glyphosate solution according to any one of claims 1 to 5, characterized in that: Used for weed control in non-arable land, the dosage is 120~280ml / mu.

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